Shoulder muscle twisted in a court (6)
I believe the answer is:
accept
'shoulder' is the definition.
(thesaurus)
'muscle twisted in a court' is the wordplay.
'muscle' becomes 'pec' (pectoral muscle).
'twisted' is a reversal indicator.
'in' is an insertion indicator.
'court' becomes 'ct' (abbreviation used in road names).
'pec' written backwards gives 'cep'.
'a'+'ct'='act'
'cep' put into 'act' is 'ACCEPT'.
(Other definitions for accept that I've seen before include "Take up, obtain" , "Consider or hold as true" , "Welcome" , "Acknowledge" , "Receive something proffered" .)